*{margin:0;padding:0;box-sizing:border-box}:root{--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;--font-mono: "JetBrains Mono", "Fira Code", monospace;--bg-primary: #0f172a;--bg-secondary: #1e293b;--bg-tertiary: #334155;--text-primary: #f1f5f9;--text-secondary: #94a3b8;--text-tertiary: #64748b;--primary-color: #3b82f6;--primary-glow: rgba(59, 130, 246, .5);--primary-hover: #60a5fa;--accent-color: #8b5cf6;--accent-glow: rgba(139, 92, 246, .5);--success-color: #10b981;--warning-color: #f59e0b;--danger-color: #ef4444;--border-color: #334155;--border-hover: #475569;--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 16px;--spacing-lg: 24px;--spacing-xl: 32px;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--glow-primary: 0 0 15px var(--primary-glow);--transition-fast: .2s ease;--transition-normal: .3s ease;font-family:var(--font-sans);line-height:1.6;font-weight:400;color-scheme:dark;color:var(--text-primary);background-color:var(--bg-primary);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;padding:0;min-width:320px;min-height:100vh;background:radial-gradient(circle at top center,#1e293b,#0f172a 60%,#020617);background-attachment:fixed}#root{width:100%;min-height:100vh}button{font-family:inherit}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:var(--bg-tertiary);border-radius:5px}::-webkit-scrollbar-thumb:hover{background:var(--text-tertiary)}@font-face{font-display:block;font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(/assets/KaTeX_AMS-Regular-BQhdFMY1.woff2) format("woff2"),url(/assets/KaTeX_AMS-Regular-DMm9YOAa.woff) format("woff"),url(/assets/KaTeX_AMS-Regular-DRggAlZN.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Caligraphic-Bold-Dq_IR9rO.woff2) format("woff2"),url(/assets/KaTeX_Caligraphic-Bold-BEiXGLvX.woff) format("woff"),url(/assets/KaTeX_Caligraphic-Bold-ATXxdsX0.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Caligraphic-Regular-Di6jR-x-.woff2) format("woff2"),url(/assets/KaTeX_Caligraphic-Regular-CTRA-rTL.woff) format("woff"),url(/assets/KaTeX_Caligraphic-Regular-wX97UBjC.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Fraktur-Bold-CL6g_b3V.woff2) format("woff2"),url(/assets/KaTeX_Fraktur-Bold-BsDP51OF.woff) format("woff"),url(/assets/KaTeX_Fraktur-Bold-BdnERNNW.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Fraktur-Regular-CTYiF6lA.woff2) format("woff2"),url(/assets/KaTeX_Fraktur-Regular-Dxdc4cR9.woff) format("woff"),url(/assets/KaTeX_Fraktur-Regular-CB_wures.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Main-Bold-Cx986IdX.woff2) format("woff2"),url(/assets/KaTeX_Main-Bold-Jm3AIy58.woff) format("woff"),url(/assets/KaTeX_Main-Bold-waoOVXN0.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Main-BoldItalic-DxDJ3AOS.woff2) format("woff2"),url(/assets/KaTeX_Main-BoldItalic-SpSLRI95.woff) format("woff"),url(/assets/KaTeX_Main-BoldItalic-DzxPMmG6.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Main-Italic-NWA7e6Wa.woff2) format("woff2"),url(/assets/KaTeX_Main-Italic-BMLOBm91.woff) format("woff"),url(/assets/KaTeX_Main-Italic-3WenGoN9.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Main-Regular-B22Nviop.woff2) format("woff2"),url(/assets/KaTeX_Main-Regular-Dr94JaBh.woff) format("woff"),url(/assets/KaTeX_Main-Regular-ypZvNtVU.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Math-BoldItalic-CZnvNsCZ.woff2) format("woff2"),url(/assets/KaTeX_Math-BoldItalic-iY-2wyZ7.woff) format("woff"),url(/assets/KaTeX_Math-BoldItalic-B3XSjfu4.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Math-Italic-t53AETM-.woff2) format("woff2"),url(/assets/KaTeX_Math-Italic-DA0__PXp.woff) format("woff"),url(/assets/KaTeX_Math-Italic-flOr_0UB.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:700;src:url(/assets/KaTeX_SansSerif-Bold-D1sUS0GD.woff2) format("woff2"),url(/assets/KaTeX_SansSerif-Bold-DbIhKOiC.woff) format("woff"),url(/assets/KaTeX_SansSerif-Bold-CFMepnvq.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:italic;font-weight:400;src:url(/assets/KaTeX_SansSerif-Italic-C3H0VqGB.woff2) format("woff2"),url(/assets/KaTeX_SansSerif-Italic-DN2j7dab.woff) format("woff"),url(/assets/KaTeX_SansSerif-Italic-YYjJ1zSn.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:400;src:url(/assets/KaTeX_SansSerif-Regular-DDBCnlJ7.woff2) format("woff2"),url(/assets/KaTeX_SansSerif-Regular-CS6fqUqJ.woff) format("woff"),url(/assets/KaTeX_SansSerif-Regular-BNo7hRIc.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Script-Regular-D3wIWfF6.woff2) format("woff2"),url(/assets/KaTeX_Script-Regular-D5yQViql.woff) format("woff"),url(/assets/KaTeX_Script-Regular-C5JkGWo-.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size1-Regular-mCD8mA8B.woff2) format("woff2"),url(/assets/KaTeX_Size1-Regular-C195tn64.woff) format("woff"),url(/assets/KaTeX_Size1-Regular-Dbsnue_I.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size2;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size2-Regular-Dy4dx90m.woff2) format("woff2"),url(/assets/KaTeX_Size2-Regular-oD1tc_U0.woff) format("woff"),url(/assets/KaTeX_Size2-Regular-B7gKUWhC.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size3;font-style:normal;font-weight:400;src:url(data:font/woff2;base64,d09GMgABAAAAAA4oAA4AAAAAHbQAAA3TAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAABmAAgRQIDgmcDBEICo1oijYBNgIkA14LMgAEIAWJAAeBHAyBHBvbGiMRdnO0IkRRkiYDgr9KsJ1NUAf2kILNxgUmgqIgq1P89vcbIcmsQbRps3vCcXdYOKSWEPEKgZgQkprQQsxIXUgq0DqpGKmIvrgkeVGtEQD9DzAO29fM9jYhxZEsL2FeURH2JN4MIcTdO049NCVdxQ/w9NrSYFEBKTDKpLKfNkCGDc1RwjZLQcm3vqJ2UW9Xfa3tgAHz6ivp6vgC2yD4/6352ndnN0X0TL7seypkjZlMsjmZnf0Mm5Q+JykRWQBKCVCVPbARPXWyQtb5VgLB6Biq7/Uixcj2WGqdI8tGSgkuRG+t910GKP2D7AQH0DB9FMDW/obJZ8giFI3Wg8Cvevz0M+5m0rTh7XDBlvo9Y4vm13EXmfttwI4mBo1EG15fxJhUiCLbiiyCf/ZA6MFAhg3pGIZGdGIVjtPn6UcMk9A/UUr9PhoNsCENw1APAq0gpH73e+M+0ueyHbabc3vkbcdtzcf/fiy+NxQEjf9ud/ELBHAXJ0nk4z+MXH2Ev/kWyV4k7SkvpPc9Qr38F6RPWnM9cN6DJ0AdD1BhtgABtmoRoFCvPsBAumNm6soZG2Gk5GyVTo2sJncSyp0jQTYoR6WDvTwaaEcHsxHfvuWhHA3a6bN7twRKtcGok6NsCi7jYRrM2jExsUFMxMQYuJbMhuWNOumEJy9hi29Dmg5zMp/A5+hhPG19j1vBrq8JTLr8ki5VLPmG/PynJHVul440bxg5xuymHUFPBshC+nA9I1FmwbRBTNHAcik3Oae0cxKoI3MOriM42UrPe51nsaGxJ+WfXubAsP84aabUlQSJ1IiE0iPETLUU4CATgfXSCSpuRFRmCGbO+wSpAnzaeaCYW1VNEysRtuXCEL1kUFUbbtMv3Tilt/1c11jt3Q5bbMa84cpWipp8Elw3MZhOHsOlwwVUQM3lAR35JiFQbaYCRnMF2lxAWoOg2gyoIV4PouX8HytNIfLhqpJtXB4vjiViUI8IJ7bkC4ikkQvKksnOTKICwnqWSZ9YS5f0WCxmpgjbIq7EJcM4aI2nmhLNY2JIUgOjXZFWBHb+x5oh6cwb0Tv1ackHdKi0I9OO2wE9aogIOn540CCCziyhN+IaejtgAONKznHlHyutPrHGwCx9S6B8kfS4Mfi4Eyv7OU730bT1SCBjt834cXsf43zVjPUqqJjgrjeGnBxSG4aYAKFuVbeCfkDIjAqMb6yLNIbCuvXhMH2/+k2vkNpkORhR59N1CkzoOENvneIosjYmuTxlhUzaGEJQ/iWqx4dmwpmKjrwTiTGTCVozNAYqk/zXOndWxuWSmJkQpJw3pK5KX6QrLt5LATMqpmPAQhkhK6PUjzHUn7E0gHE0kPE0iKkolgkUx9SZmVAdDgpffdyJKg3k7VmzYGCwVXGz/tXmkOIp+vcWs+EMuhhvN0h9uhfzWJziBQmCREGSIFmQIkgVpAnSBRmC//6hkLZwaVhwxlrJSOdqlFtOYxlau9F2QN5Y98xmIAsiM1HVp2VFX+DHHGg6Ecjh3vmqtidX3qHI2qycTk/iwxSt5UzTmEP92ZBnEWTk4Mx8Mpl78ZDokxg/KWb+Q0QkvdKVmq3TMW+RXEgrsziSAfNXFMhDc60N5N9jQzjfO0kBKpUZl0ZmwJ41j/B9Hz6wmRaJB84niNmQrzp9eSlQCDDzazGDdVi3P36VZQ+Jy4f9UBNp+3zTjqI4abaFAm+GShVaXlsGdF3FYzZcDI6cori4kMxUECl9IjJZpzkvitAoxKue+90pDMvcKRxLl53TmOKCmV/xRolNKSqqUxc6LStOETmFOiLZZptlZepcKiAzteG8PEdpnQpbOMNcMsR4RR2Bs0cKFEvSmIjAFcnarqwUL4lDhHmnVkwu1IwshbiCcgvOheZuYyOteufZZwlcTlLgnZ3o/WcYdzZHW/WGaqaVfmTZ1aWCceJjkbZqsfbkOtcFlUZM/jy+hXHDbaUobWqqXaeWobbLO99yG5N3U4wxco0rQGGcOLASFMXeJoham8M+/x6O2WywK2l4HGbq1CoUyC/IZikQhdq3SiuNrvAEj0AVu9x2x3lp/xWzahaxidezFVtdcb5uEnzyl0ZmYiuKI0exvCd4Xc9CV1KB0db00z92wDPde0kukbvZIWN6jUWFTmPIC/Y4UPCm8UfDTFZpZNon1qLFTkBhxzB+FjQRA2Q/YRJT8pQigslMaUpFyAG8TMlXigiqmAZX4xgijKjRlGpLE0GdplRfCaJo0JQaSxNBk6ZmMzcya0FmrcisDdn0Q3HI2sWSppYigmlM1XT/kLQZSNpMJG0WkjYbSZuDpM1F0uYhFc1HxU4m1QJjDK6iL0S5uSj5rgXc3RejEigtcRBtqYPQsiTskmO5vosV+q4VGIKbOkDg0jtRrq+Em1YloaTFar3EGr1EUC8R0kus1Uus00usL97ABr2BjXoDm/QGNhuWtMVBKOwg/i78lT7hBsAvDmwHc/ao3vmUbBmhjeYySZNWvGkfZAgISDSaDo1SVpzGDsAEkF8B+gEapViUoZgUWXcRIGFZNm6gWbAKk0bp0k1MHG9fLYtV4iS2SmLEQFARzRcnf9PUS0LVn05/J9MiRRBU3v2IrvW974v4N00L7ZMk0wXP1409CHo/an8zTRHD3eSJ6m8D4YMkZNl3M79sqeuAsr/m3f+8/yl7A50aiAEJgeBeMWzu7ui9UfUBCe2TIqZIoOd/3/udRBOQidQZUERzb2/VwZN1H/Sju82ew2H2Wfr6qvfVf3hqwDvAIpkQVFy4B9Pe9e4/XvPeceu7h3dvO56iJPf0+A6cqA2ip18ER+iFgggiuOkvj24bby0N9j2UHIkgqIt+sVgfodC4YghLSMjSZbH0VR/6dMDrYJeKHilKTemt6v6kvzvn3/RrdWtr0GoN/xL+Sex/cPYLUpepx9cz/D46UPU5KXgAQa+NDps1v6J3xP1i2HtaDB0M9aX2deA7SYff//+gUCovMmIK/qfsFcOk+4Y5ZN97XlG6zebqtMbKgeRFi51vnxTQYBUik2rS/Cn6PC8ADR8FGxsRPB82dzfND90gIcshOcYUkfjherBz53odpm6TP8txlwOZ71xmfHHOvq053qFF/MRlS3jP0ELudrf2OeN8DHvp6ZceLe8qKYvWz/7yp0u4dKPfli3CYq0O13Ih71mylJ80tOi10On8wi+F4+LWgDPeJ30msSQt9/vkmHq9/Lvo2b461mP801v3W4xTcs6CbvF9UDdrSt+A8OUbpSh55qAUFXWznBBfdeJ8a4d7ugT5tvxUza3h9m4H7ptTqiG4z0g5dc0X29OcGlhpGFMpQo9ytTS+NViZpNdvU4kWx+LKxNY10kQ1yqGXrhe4/1nvP7E+nd5A92TtaRplbHSqoIdOqtRWti+fkB5/n1+/VvCmz12pG1kpQWsfi1ftlBobm0bpngs16CHkbIwdLnParxtTV3QYRlfJ0KFskH7pdN/YDn+yRuSd7sNH3aO0DYPggk6uWuXrfOc+fa3VTxFVvKaNxHsiHmsXyCLIE5yuOeN3/Jdf8HBL/5M6shjyhxHx9BjB1O0+4NLOnjLLSxwO7ukN4jMbOIcD879KLSi6Pk61Oqm2377n8079PXEEQ7cy7OKEC9nbpet118fxweTafpt69x/Bt8UqGzNQt7aelpc44dn5cqhwf71+qKp/Zf/+a0zcizOUWpl/iBcSXip0pplkatCchoH5c5aUM8I7/dWxAej8WicPL1URFZ9BDJelUwEwTkGqUhgSlydVes95YdXvhh9Gfz/aeFWvgVb4tuLbcv4+wLdutVZv/cUonwBD/6eDlE0aSiKK/uoH3+J1wDE/jMVqY2ysGufN84oIXB0sPzy8ollX/LegY74DgJXJR57sn+VGza0x3DnuIgABFM15LmajjjsNlYj+JEZGbuRYcAMOWxFkPN2w6Wd46xo4gVWQR/X4lyI/R6K/YK0110GzudPRW7Y+UOBGTfNNzHeYT0fiH0taunBpq9HEW8OKSaBGj21L0MqenEmNRWBAWDWAk4CpNoEZJ2tTaPFgbQYj8HxtFilErs3BTRwT8uO1NXQaWfIotchmPkAF5mMBAliEmZiOGVgCG9LgRzpscMAOOwowlT3JhusdazXGSC/hxR3UlmWVwWHpOIKheqONvjyhSiTHIkVUco5bnji8m//zL7PKaT1Vl5I6UE609f+gkr6MZKVyKc7zJRmCahLsdlyA5fdQkRSan9LgnnLEyGSkaKJCJog0wAgvepWBt80+1yKln1bMVtCljfNWDueKLsWwaEbBSfSPTEmVRsUcYYMnEjcjeyCZzBXK9E9BYBXLKjOSpUDR+nEV3TFSUdQaz+ot98QxgXwx0GQ+EEUAKB2qZPkQQ0GqFD8UPFMqyaCHM24BZmSGic9EYMagKizOw9Hz50DMrDLrqqLkTAhplMictiCAx5S3BIUQdeJeLnBy2CNtMfz6cV4u8XKoFZQesbf9YZiIERiHjaNodDW6LgcirX/mPnJIkBGDUpTBhSa0EIr38D5hCIszhCM8URGBqImoWjpvpt1ebu/v3Gl3qJfMnNM+9V+kiRFyROTPHQWOcs1dNW94/ukKMPZBvDi55i5CttdeJz84DLngLqjcdwEZ87bFFR8CIG35OAkDVN6VRDZ7aq67NteYqZ2lpT8oYB2CytoBd6VuAx4WgiAsnuj3WohG+LugzXiQRDeM3XYXlULv4dp5VFYC) format("woff2"),url(/assets/KaTeX_Size3-Regular-CTq5MqoE.woff) format("woff"),url(/assets/KaTeX_Size3-Regular-DgpXs0kz.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size4;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size4-Regular-Dl5lxZxV.woff2) format("woff2"),url(/assets/KaTeX_Size4-Regular-BF-4gkZK.woff) format("woff"),url(/assets/KaTeX_Size4-Regular-DWFBv043.ttf) format("truetype")}@font-face{font-display:block;font-family:KaTeX_Typewriter;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Typewriter-Regular-CO6r4hn1.woff2) format("woff2"),url(/assets/KaTeX_Typewriter-Regular-C0xS9mPB.woff) format("woff"),url(/assets/KaTeX_Typewriter-Regular-D3Ib7_Hf.ttf) format("truetype")}.katex{font: 1.21em KaTeX_Main,Times New Roman,serif;line-height:1.2;text-indent:0;text-rendering:auto}.katex *{-ms-high-contrast-adjust:none!important;border-color:currentColor}.katex .katex-version:after{content:"0.16.27"}.katex .katex-mathml{clip:rect(1px,1px,1px,1px);border:0;height:1px;overflow:hidden;padding:0;position:absolute;width:1px}.katex .katex-html>.newline{display:block}.katex .base{position:relative;white-space:nowrap;width:-webkit-min-content;width:-moz-min-content;width:min-content}.katex .base,.katex .strut{display:inline-block}.katex .textbf{font-weight:700}.katex .textit{font-style:italic}.katex .textrm{font-family:KaTeX_Main}.katex .textsf{font-family:KaTeX_SansSerif}.katex .texttt{font-family:KaTeX_Typewriter}.katex .mathnormal{font-family:KaTeX_Math;font-style:italic}.katex .mathit{font-family:KaTeX_Main;font-style:italic}.katex .mathrm{font-style:normal}.katex .mathbf{font-family:KaTeX_Main;font-weight:700}.katex .boldsymbol{font-family:KaTeX_Math;font-style:italic;font-weight:700}.katex .amsrm,.katex .mathbb,.katex .textbb{font-family:KaTeX_AMS}.katex .mathcal{font-family:KaTeX_Caligraphic}.katex .mathfrak,.katex .textfrak{font-family:KaTeX_Fraktur}.katex .mathboldfrak,.katex .textboldfrak{font-family:KaTeX_Fraktur;font-weight:700}.katex .mathtt{font-family:KaTeX_Typewriter}.katex .mathscr,.katex .textscr{font-family:KaTeX_Script}.katex .mathsf,.katex .textsf{font-family:KaTeX_SansSerif}.katex .mathboldsf,.katex .textboldsf{font-family:KaTeX_SansSerif;font-weight:700}.katex .mathitsf,.katex .mathsfit,.katex .textitsf{font-family:KaTeX_SansSerif;font-style:italic}.katex .mainrm{font-family:KaTeX_Main;font-style:normal}.katex .vlist-t{border-collapse:collapse;display:inline-table;table-layout:fixed}.katex .vlist-r{display:table-row}.katex .vlist{display:table-cell;position:relative;vertical-align:bottom}.katex .vlist>span{display:block;height:0;position:relative}.katex .vlist>span>span{display:inline-block}.katex .vlist>span>.pstrut{overflow:hidden;width:0}.katex .vlist-t2{margin-right:-2px}.katex .vlist-s{display:table-cell;font-size:1px;min-width:2px;vertical-align:bottom;width:2px}.katex .vbox{align-items:baseline;display:inline-flex;flex-direction:column}.katex .hbox{width:100%}.katex .hbox,.katex .thinbox{display:inline-flex;flex-direction:row}.katex .thinbox{max-width:0;width:0}.katex .msupsub{text-align:left}.katex .mfrac>span>span{text-align:center}.katex .mfrac .frac-line{border-bottom-style:solid;display:inline-block;width:100%}.katex .hdashline,.katex .hline,.katex .mfrac .frac-line,.katex .overline .overline-line,.katex .rule,.katex .underline .underline-line{min-height:1px}.katex .mspace{display:inline-block}.katex .clap,.katex .llap,.katex .rlap{position:relative;width:0}.katex .clap>.inner,.katex .llap>.inner,.katex .rlap>.inner{position:absolute}.katex .clap>.fix,.katex .llap>.fix,.katex .rlap>.fix{display:inline-block}.katex .llap>.inner{right:0}.katex .clap>.inner,.katex .rlap>.inner{left:0}.katex .clap>.inner>span{margin-left:-50%;margin-right:50%}.katex .rule{border:0 solid;display:inline-block;position:relative}.katex .hline,.katex .overline .overline-line,.katex .underline .underline-line{border-bottom-style:solid;display:inline-block;width:100%}.katex .hdashline{border-bottom-style:dashed;display:inline-block;width:100%}.katex .sqrt>.root{margin-left:.2777777778em;margin-right:-.5555555556em}.katex .fontsize-ensurer.reset-size1.size1,.katex .sizing.reset-size1.size1{font-size:1em}.katex .fontsize-ensurer.reset-size1.size2,.katex .sizing.reset-size1.size2{font-size:1.2em}.katex .fontsize-ensurer.reset-size1.size3,.katex .sizing.reset-size1.size3{font-size:1.4em}.katex .fontsize-ensurer.reset-size1.size4,.katex .sizing.reset-size1.size4{font-size:1.6em}.katex .fontsize-ensurer.reset-size1.size5,.katex .sizing.reset-size1.size5{font-size:1.8em}.katex .fontsize-ensurer.reset-size1.size6,.katex .sizing.reset-size1.size6{font-size:2em}.katex .fontsize-ensurer.reset-size1.size7,.katex .sizing.reset-size1.size7{font-size:2.4em}.katex .fontsize-ensurer.reset-size1.size8,.katex .sizing.reset-size1.size8{font-size:2.88em}.katex .fontsize-ensurer.reset-size1.size9,.katex .sizing.reset-size1.size9{font-size:3.456em}.katex .fontsize-ensurer.reset-size1.size10,.katex .sizing.reset-size1.size10{font-size:4.148em}.katex .fontsize-ensurer.reset-size1.size11,.katex .sizing.reset-size1.size11{font-size:4.976em}.katex .fontsize-ensurer.reset-size2.size1,.katex .sizing.reset-size2.size1{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size2.size2,.katex .sizing.reset-size2.size2{font-size:1em}.katex .fontsize-ensurer.reset-size2.size3,.katex .sizing.reset-size2.size3{font-size:1.1666666667em}.katex .fontsize-ensurer.reset-size2.size4,.katex .sizing.reset-size2.size4{font-size:1.3333333333em}.katex .fontsize-ensurer.reset-size2.size5,.katex .sizing.reset-size2.size5{font-size:1.5em}.katex .fontsize-ensurer.reset-size2.size6,.katex .sizing.reset-size2.size6{font-size:1.6666666667em}.katex .fontsize-ensurer.reset-size2.size7,.katex .sizing.reset-size2.size7{font-size:2em}.katex .fontsize-ensurer.reset-size2.size8,.katex .sizing.reset-size2.size8{font-size:2.4em}.katex .fontsize-ensurer.reset-size2.size9,.katex .sizing.reset-size2.size9{font-size:2.88em}.katex .fontsize-ensurer.reset-size2.size10,.katex .sizing.reset-size2.size10{font-size:3.4566666667em}.katex .fontsize-ensurer.reset-size2.size11,.katex .sizing.reset-size2.size11{font-size:4.1466666667em}.katex .fontsize-ensurer.reset-size3.size1,.katex .sizing.reset-size3.size1{font-size:.7142857143em}.katex .fontsize-ensurer.reset-size3.size2,.katex .sizing.reset-size3.size2{font-size:.8571428571em}.katex .fontsize-ensurer.reset-size3.size3,.katex .sizing.reset-size3.size3{font-size:1em}.katex .fontsize-ensurer.reset-size3.size4,.katex .sizing.reset-size3.size4{font-size:1.1428571429em}.katex .fontsize-ensurer.reset-size3.size5,.katex .sizing.reset-size3.size5{font-size:1.2857142857em}.katex .fontsize-ensurer.reset-size3.size6,.katex .sizing.reset-size3.size6{font-size:1.4285714286em}.katex .fontsize-ensurer.reset-size3.size7,.katex .sizing.reset-size3.size7{font-size:1.7142857143em}.katex .fontsize-ensurer.reset-size3.size8,.katex .sizing.reset-size3.size8{font-size:2.0571428571em}.katex .fontsize-ensurer.reset-size3.size9,.katex .sizing.reset-size3.size9{font-size:2.4685714286em}.katex .fontsize-ensurer.reset-size3.size10,.katex .sizing.reset-size3.size10{font-size:2.9628571429em}.katex .fontsize-ensurer.reset-size3.size11,.katex .sizing.reset-size3.size11{font-size:3.5542857143em}.katex .fontsize-ensurer.reset-size4.size1,.katex .sizing.reset-size4.size1{font-size:.625em}.katex .fontsize-ensurer.reset-size4.size2,.katex .sizing.reset-size4.size2{font-size:.75em}.katex .fontsize-ensurer.reset-size4.size3,.katex .sizing.reset-size4.size3{font-size:.875em}.katex .fontsize-ensurer.reset-size4.size4,.katex .sizing.reset-size4.size4{font-size:1em}.katex .fontsize-ensurer.reset-size4.size5,.katex .sizing.reset-size4.size5{font-size:1.125em}.katex .fontsize-ensurer.reset-size4.size6,.katex .sizing.reset-size4.size6{font-size:1.25em}.katex .fontsize-ensurer.reset-size4.size7,.katex .sizing.reset-size4.size7{font-size:1.5em}.katex .fontsize-ensurer.reset-size4.size8,.katex .sizing.reset-size4.size8{font-size:1.8em}.katex .fontsize-ensurer.reset-size4.size9,.katex .sizing.reset-size4.size9{font-size:2.16em}.katex .fontsize-ensurer.reset-size4.size10,.katex .sizing.reset-size4.size10{font-size:2.5925em}.katex .fontsize-ensurer.reset-size4.size11,.katex .sizing.reset-size4.size11{font-size:3.11em}.katex .fontsize-ensurer.reset-size5.size1,.katex .sizing.reset-size5.size1{font-size:.5555555556em}.katex .fontsize-ensurer.reset-size5.size2,.katex .sizing.reset-size5.size2{font-size:.6666666667em}.katex .fontsize-ensurer.reset-size5.size3,.katex .sizing.reset-size5.size3{font-size:.7777777778em}.katex .fontsize-ensurer.reset-size5.size4,.katex .sizing.reset-size5.size4{font-size:.8888888889em}.katex .fontsize-ensurer.reset-size5.size5,.katex .sizing.reset-size5.size5{font-size:1em}.katex .fontsize-ensurer.reset-size5.size6,.katex .sizing.reset-size5.size6{font-size:1.1111111111em}.katex .fontsize-ensurer.reset-size5.size7,.katex .sizing.reset-size5.size7{font-size:1.3333333333em}.katex .fontsize-ensurer.reset-size5.size8,.katex .sizing.reset-size5.size8{font-size:1.6em}.katex .fontsize-ensurer.reset-size5.size9,.katex .sizing.reset-size5.size9{font-size:1.92em}.katex .fontsize-ensurer.reset-size5.size10,.katex .sizing.reset-size5.size10{font-size:2.3044444444em}.katex .fontsize-ensurer.reset-size5.size11,.katex .sizing.reset-size5.size11{font-size:2.7644444444em}.katex .fontsize-ensurer.reset-size6.size1,.katex .sizing.reset-size6.size1{font-size:.5em}.katex .fontsize-ensurer.reset-size6.size2,.katex .sizing.reset-size6.size2{font-size:.6em}.katex .fontsize-ensurer.reset-size6.size3,.katex .sizing.reset-size6.size3{font-size:.7em}.katex .fontsize-ensurer.reset-size6.size4,.katex .sizing.reset-size6.size4{font-size:.8em}.katex .fontsize-ensurer.reset-size6.size5,.katex .sizing.reset-size6.size5{font-size:.9em}.katex .fontsize-ensurer.reset-size6.size6,.katex .sizing.reset-size6.size6{font-size:1em}.katex .fontsize-ensurer.reset-size6.size7,.katex .sizing.reset-size6.size7{font-size:1.2em}.katex .fontsize-ensurer.reset-size6.size8,.katex .sizing.reset-size6.size8{font-size:1.44em}.katex .fontsize-ensurer.reset-size6.size9,.katex .sizing.reset-size6.size9{font-size:1.728em}.katex .fontsize-ensurer.reset-size6.size10,.katex .sizing.reset-size6.size10{font-size:2.074em}.katex .fontsize-ensurer.reset-size6.size11,.katex .sizing.reset-size6.size11{font-size:2.488em}.katex .fontsize-ensurer.reset-size7.size1,.katex .sizing.reset-size7.size1{font-size:.4166666667em}.katex .fontsize-ensurer.reset-size7.size2,.katex .sizing.reset-size7.size2{font-size:.5em}.katex .fontsize-ensurer.reset-size7.size3,.katex .sizing.reset-size7.size3{font-size:.5833333333em}.katex .fontsize-ensurer.reset-size7.size4,.katex .sizing.reset-size7.size4{font-size:.6666666667em}.katex .fontsize-ensurer.reset-size7.size5,.katex .sizing.reset-size7.size5{font-size:.75em}.katex .fontsize-ensurer.reset-size7.size6,.katex .sizing.reset-size7.size6{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size7.size7,.katex .sizing.reset-size7.size7{font-size:1em}.katex .fontsize-ensurer.reset-size7.size8,.katex .sizing.reset-size7.size8{font-size:1.2em}.katex .fontsize-ensurer.reset-size7.size9,.katex .sizing.reset-size7.size9{font-size:1.44em}.katex .fontsize-ensurer.reset-size7.size10,.katex .sizing.reset-size7.size10{font-size:1.7283333333em}.katex .fontsize-ensurer.reset-size7.size11,.katex .sizing.reset-size7.size11{font-size:2.0733333333em}.katex .fontsize-ensurer.reset-size8.size1,.katex .sizing.reset-size8.size1{font-size:.3472222222em}.katex .fontsize-ensurer.reset-size8.size2,.katex .sizing.reset-size8.size2{font-size:.4166666667em}.katex .fontsize-ensurer.reset-size8.size3,.katex .sizing.reset-size8.size3{font-size:.4861111111em}.katex .fontsize-ensurer.reset-size8.size4,.katex .sizing.reset-size8.size4{font-size:.5555555556em}.katex .fontsize-ensurer.reset-size8.size5,.katex .sizing.reset-size8.size5{font-size:.625em}.katex .fontsize-ensurer.reset-size8.size6,.katex .sizing.reset-size8.size6{font-size:.6944444444em}.katex .fontsize-ensurer.reset-size8.size7,.katex .sizing.reset-size8.size7{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size8.size8,.katex .sizing.reset-size8.size8{font-size:1em}.katex .fontsize-ensurer.reset-size8.size9,.katex .sizing.reset-size8.size9{font-size:1.2em}.katex .fontsize-ensurer.reset-size8.size10,.katex .sizing.reset-size8.size10{font-size:1.4402777778em}.katex .fontsize-ensurer.reset-size8.size11,.katex .sizing.reset-size8.size11{font-size:1.7277777778em}.katex .fontsize-ensurer.reset-size9.size1,.katex .sizing.reset-size9.size1{font-size:.2893518519em}.katex .fontsize-ensurer.reset-size9.size2,.katex .sizing.reset-size9.size2{font-size:.3472222222em}.katex .fontsize-ensurer.reset-size9.size3,.katex .sizing.reset-size9.size3{font-size:.4050925926em}.katex .fontsize-ensurer.reset-size9.size4,.katex .sizing.reset-size9.size4{font-size:.462962963em}.katex .fontsize-ensurer.reset-size9.size5,.katex .sizing.reset-size9.size5{font-size:.5208333333em}.katex .fontsize-ensurer.reset-size9.size6,.katex .sizing.reset-size9.size6{font-size:.5787037037em}.katex .fontsize-ensurer.reset-size9.size7,.katex .sizing.reset-size9.size7{font-size:.6944444444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .sizing.reset-size9.size8{font-size:.8333333333em}.katex .fontsize-ensurer.reset-size9.size9,.katex .sizing.reset-size9.size9{font-size:1em}.katex .fontsize-ensurer.reset-size9.size10,.katex .sizing.reset-size9.size10{font-size:1.2002314815em}.katex .fontsize-ensurer.reset-size9.size11,.katex .sizing.reset-size9.size11{font-size:1.4398148148em}.katex .fontsize-ensurer.reset-size10.size1,.katex .sizing.reset-size10.size1{font-size:.2410800386em}.katex .fontsize-ensurer.reset-size10.size2,.katex .sizing.reset-size10.size2{font-size:.2892960463em}.katex .fontsize-ensurer.reset-size10.size3,.katex .sizing.reset-size10.size3{font-size:.337512054em}.katex .fontsize-ensurer.reset-size10.size4,.katex .sizing.reset-size10.size4{font-size:.3857280617em}.katex .fontsize-ensurer.reset-size10.size5,.katex .sizing.reset-size10.size5{font-size:.4339440694em}.katex .fontsize-ensurer.reset-size10.size6,.katex .sizing.reset-size10.size6{font-size:.4821600771em}.katex .fontsize-ensurer.reset-size10.size7,.katex .sizing.reset-size10.size7{font-size:.5785920926em}.katex .fontsize-ensurer.reset-size10.size8,.katex .sizing.reset-size10.size8{font-size:.6943105111em}.katex .fontsize-ensurer.reset-size10.size9,.katex .sizing.reset-size10.size9{font-size:.8331726133em}.katex .fontsize-ensurer.reset-size10.size10,.katex .sizing.reset-size10.size10{font-size:1em}.katex .fontsize-ensurer.reset-size10.size11,.katex .sizing.reset-size10.size11{font-size:1.1996142719em}.katex .fontsize-ensurer.reset-size11.size1,.katex .sizing.reset-size11.size1{font-size:.2009646302em}.katex .fontsize-ensurer.reset-size11.size2,.katex .sizing.reset-size11.size2{font-size:.2411575563em}.katex .fontsize-ensurer.reset-size11.size3,.katex .sizing.reset-size11.size3{font-size:.2813504823em}.katex .fontsize-ensurer.reset-size11.size4,.katex .sizing.reset-size11.size4{font-size:.3215434084em}.katex .fontsize-ensurer.reset-size11.size5,.katex .sizing.reset-size11.size5{font-size:.3617363344em}.katex .fontsize-ensurer.reset-size11.size6,.katex .sizing.reset-size11.size6{font-size:.4019292605em}.katex .fontsize-ensurer.reset-size11.size7,.katex .sizing.reset-size11.size7{font-size:.4823151125em}.katex .fontsize-ensurer.reset-size11.size8,.katex .sizing.reset-size11.size8{font-size:.578778135em}.katex .fontsize-ensurer.reset-size11.size9,.katex .sizing.reset-size11.size9{font-size:.6945337621em}.katex .fontsize-ensurer.reset-size11.size10,.katex .sizing.reset-size11.size10{font-size:.8336012862em}.katex .fontsize-ensurer.reset-size11.size11,.katex .sizing.reset-size11.size11{font-size:1em}.katex .delimsizing.size1{font-family:KaTeX_Size1}.katex .delimsizing.size2{font-family:KaTeX_Size2}.katex .delimsizing.size3{font-family:KaTeX_Size3}.katex .delimsizing.size4{font-family:KaTeX_Size4}.katex .delimsizing.mult .delim-size1>span{font-family:KaTeX_Size1}.katex .delimsizing.mult .delim-size4>span{font-family:KaTeX_Size4}.katex .nulldelimiter{display:inline-block;width:.12em}.katex .delimcenter,.katex .op-symbol{position:relative}.katex .op-symbol.small-op{font-family:KaTeX_Size1}.katex .op-symbol.large-op{font-family:KaTeX_Size2}.katex .accent>.vlist-t,.katex .op-limits>.vlist-t{text-align:center}.katex .accent .accent-body{position:relative}.katex .accent .accent-body:not(.accent-full){width:0}.katex .overlay{display:block}.katex .mtable .vertical-separator{display:inline-block;min-width:1px}.katex .mtable .arraycolsep{display:inline-block}.katex .mtable .col-align-c>.vlist-t{text-align:center}.katex .mtable .col-align-l>.vlist-t{text-align:left}.katex .mtable .col-align-r>.vlist-t{text-align:right}.katex .svg-align{text-align:left}.katex svg{fill:currentColor;stroke:currentColor;fill-rule:nonzero;fill-opacity:1;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1;display:block;height:inherit;position:absolute;width:100%}.katex svg path{stroke:none}.katex img{border-style:none;max-height:none;max-width:none;min-height:0;min-width:0}.katex .stretchy{display:block;overflow:hidden;position:relative;width:100%}.katex .stretchy:after,.katex .stretchy:before{content:""}.katex .hide-tail{overflow:hidden;position:relative;width:100%}.katex .halfarrow-left{left:0;overflow:hidden;position:absolute;width:50.2%}.katex .halfarrow-right{overflow:hidden;position:absolute;right:0;width:50.2%}.katex .brace-left{left:0;overflow:hidden;position:absolute;width:25.1%}.katex .brace-center{left:25%;overflow:hidden;position:absolute;width:50%}.katex .brace-right{overflow:hidden;position:absolute;right:0;width:25.1%}.katex .x-arrow-pad{padding:0 .5em}.katex .cd-arrow-pad{padding:0 .55556em 0 .27778em}.katex .mover,.katex .munder,.katex .x-arrow{text-align:center}.katex .boxpad{padding:0 .3em}.katex .fbox,.katex .fcolorbox{border:.04em solid;box-sizing:border-box}.katex .cancel-pad{padding:0 .2em}.katex .cancel-lap{margin-left:-.2em;margin-right:-.2em}.katex .sout{border-bottom-style:solid;border-bottom-width:.08em}.katex .angl{border-right:.049em solid;border-top:.049em solid;box-sizing:border-box;margin-right:.03889em}.katex .anglpad{padding:0 .03889em}.katex .eqn-num:before{content:"(" counter(katexEqnNo) ")";counter-increment:katexEqnNo}.katex .mml-eqn-num:before{content:"(" counter(mmlEqnNo) ")";counter-increment:mmlEqnNo}.katex .mtr-glue{width:50%}.katex .cd-vert-arrow{display:inline-block;position:relative}.katex .cd-label-left{display:inline-block;position:absolute;right:calc(50% + .3em);text-align:left}.katex .cd-label-right{display:inline-block;left:calc(50% + .3em);position:absolute;text-align:right}.katex-display{display:block;margin:1em 0;text-align:center}.katex-display>.katex{display:block;text-align:center;white-space:nowrap}.katex-display>.katex>.katex-html{display:block;position:relative}.katex-display>.katex>.katex-html>.tag{position:absolute;right:0}.katex-display.leqno>.katex>.katex-html>.tag{left:0;right:auto}.katex-display.fleqn>.katex{padding-left:2em;text-align:left}body{counter-reset:katexEqnNo mmlEqnNo}.skill-node{position:relative;padding:24px;background:#1e293bb3;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid var(--border-color);border-radius:16px;cursor:pointer;transition:var(--transition-normal);box-shadow:var(--shadow-sm);display:flex;flex-direction:column;min-height:160px;overflow:hidden}.skill-node:before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,transparent,var(--text-tertiary),transparent);opacity:0;transition:var(--transition-normal)}.skill-node:hover{transform:translateY(-4px);background:#1e293be6;box-shadow:var(--shadow-lg);border-color:var(--border-hover)}.skill-node:hover:before{opacity:1}.skill-node:focus-visible{outline:2px solid var(--primary-color);outline-offset:4px;border-color:var(--primary-color)}.skill-node.locked{opacity:.5;cursor:not-allowed;background:var(--bg-secondary);border-color:transparent}.skill-node.available{border-color:#3b82f64d}.skill-node.available:hover{border-color:var(--primary-color);box-shadow:0 0 20px #3b82f633}.skill-node.available:hover:before{background:linear-gradient(90deg,transparent,var(--primary-color),transparent)}.skill-node.in-progress{border-color:var(--warning-color);background:linear-gradient(145deg,#f59e0b0d,#1e293bcc)}.skill-node.completed{border-color:var(--success-color);background:linear-gradient(145deg,#10b9810d,#1e293bcc)}.skill-icon{font-size:32px;margin-bottom:16px;filter:drop-shadow(0 2px 4px rgba(0,0,0,.2))}.skill-name{font-size:18px;font-weight:600;color:var(--text-primary);margin-bottom:8px;line-height:1.3}.skill-level{font-size:13px;color:var(--text-tertiary);margin-bottom:16px;font-family:var(--font-mono)}.skill-progress-bar{width:100%;height:4px;background:var(--bg-tertiary);border-radius:2px;overflow:hidden;margin-top:auto}.skill-progress-fill{height:100%;background:var(--primary-color);border-radius:2px;transition:width 1s cubic-bezier(.4,0,.2,1)}.skill-node.completed .skill-progress-fill{background:var(--success-color);box-shadow:0 0 10px var(--success-color)}.skill-node.in-progress .skill-progress-fill{background:var(--warning-color);box-shadow:0 0 10px var(--warning-color)}.skill-tooltip{position:absolute;bottom:105%;left:50%;transform:translate(-50%) translateY(10px);width:280px;background:#0f172af2;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid var(--border-color);border-radius:12px;padding:16px;opacity:0;pointer-events:none;transition:all .2s cubic-bezier(.4,0,.2,1);z-index:100;box-shadow:var(--shadow-xl);text-align:left}.skill-node:hover .skill-tooltip{opacity:1;transform:translate(-50%) translateY(0)}.tooltip-title{font-size:16px;font-weight:700;color:var(--text-primary);margin-bottom:8px}.tooltip-description{font-size:13px;color:var(--text-secondary);margin-bottom:16px;line-height:1.5}.tooltip-stats{display:flex;justify-content:space-between;padding-top:12px;border-top:1px solid var(--border-color);font-size:12px;font-family:var(--font-mono);color:var(--text-tertiary)}.modal-overlay{position:fixed;inset:0;background:#020617cc;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:1000;animation:fadeIn .2s ease-out}.modal-content{background:var(--bg-secondary);width:100%;max-width:1000px;height:90vh;max-height:900px;border-radius:24px;border:1px solid var(--border-color);box-shadow:var(--shadow-lg);position:relative;overflow:hidden;display:flex;flex-direction:column;animation:scaleIn .3s cubic-bezier(.16,1,.3,1)}@keyframes scaleIn{0%{transform:scale(.95);opacity:0}to{transform:scale(1);opacity:1}}.modal-close{position:absolute;top:20px;right:20px;background:#ffffff0d;border:none;border-radius:50%;width:40px;height:40px;color:var(--text-secondary);font-size:20px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:var(--transition-fast);z-index:10}.modal-close:hover{background:#ffffff1a;color:var(--text-primary);transform:rotate(90deg)}.lesson-list,.learning-content-view,.quiz-view,.results-view{padding:40px;overflow-y:auto;height:100%}h2{font-size:32px;font-weight:800;color:var(--text-primary);margin-bottom:16px;letter-spacing:-.02em}h3{font-size:20px;font-weight:600;color:var(--text-primary);margin-bottom:12px}p{color:var(--text-secondary);font-size:16px;line-height:1.6}.level-section{margin-bottom:40px}.level-header{display:flex;align-items:center;gap:12px;margin-bottom:20px;padding-bottom:12px;border-bottom:1px solid var(--border-color)}.level-title{color:var(--text-primary);font-size:18px;font-weight:600;margin:0}.lessons{display:grid;gap:16px}.lesson-card{background:var(--bg-tertiary);border:1px solid transparent;border-radius:12px;padding:20px;cursor:pointer;transition:var(--transition-fast);display:flex;align-items:flex-start;gap:16px}.lesson-card:hover{background:var(--bg-secondary);border-color:var(--primary-color);transform:translate(4px)}.lesson-card.completed{background:#10b9810d;border-color:#10b98133}.lesson-card.completed .lesson-status{color:var(--success-color);background:#10b9811a}.lesson-status{width:40px;height:40px;border-radius:10px;background:var(--bg-primary);color:var(--text-tertiary);display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}.lesson-info h4{color:var(--text-primary);font-size:16px;font-weight:600;margin:0 0 4px}.lesson-info p{font-size:14px;color:var(--text-secondary);margin:0}.question-text{font-size:24px;font-weight:600;color:var(--text-primary);margin:40px 0;text-align:center}.answers{display:grid;gap:16px;max-width:600px;margin:0 auto}.answer-option{background:var(--bg-tertiary);border:2px solid transparent;border-radius:12px;padding:20px;cursor:pointer;transition:var(--transition-fast);display:flex;align-items:center;gap:16px;font-size:16px;color:var(--text-secondary)}.answer-option:hover{background:var(--bg-secondary);border-color:var(--border-hover)}.answer-option.selected{border-color:var(--primary-color);background:#3b82f60d;color:var(--text-primary)}.answer-option.correct{border-color:var(--success-color);background:#10b9810d}.answer-option.incorrect{border-color:var(--danger-color);background:#ef44440d}.option-letter{width:32px;height:32px;flex-shrink:0;border-radius:8px;background:var(--bg-primary);color:var(--text-tertiary);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px}.answer-option.selected .option-letter{background:var(--primary-color);color:#fff}.answer-option.correct .option-letter{background:var(--success-color);color:#fff}.answer-option.incorrect .option-letter{background:var(--danger-color);color:#fff}.btn-primary{background:var(--primary-color);color:#fff;border:none;padding:12px 32px;border-radius:50px;font-weight:600;font-size:16px;cursor:pointer;transition:var(--transition-fast);box-shadow:0 4px 12px var(--primary-glow)}.btn-primary:hover{background:var(--primary-hover);transform:translateY(-2px)}.btn-secondary{background:transparent;border:1px solid var(--border-color);color:var(--text-secondary);padding:12px 24px;border-radius:50px;font-weight:500;cursor:pointer;transition:var(--transition-fast)}.btn-secondary:hover{border-color:var(--text-primary);color:var(--text-primary)}.wiki-content{font-family:var(--font-sans);font-size:16px;line-height:1.8;color:var(--text-secondary);max-width:800px;margin:0 auto}.wiki-content h1,.wiki-content h2,.wiki-content h3{color:var(--text-primary);margin-top:40px}.wiki-content p{margin-bottom:24px}.wiki-content code{font-family:var(--font-mono);background:#0000004d;padding:2px 6px;border-radius:4px;color:var(--accent-color)}.wiki-content pre{background:#020617!important;border:1px solid var(--border-color);border-radius:8px;padding:20px}.lesson-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}.lesson-tag{background:#3b82f61a;border:1px solid rgba(59,130,246,.2);border-radius:12px;padding:4px 10px;font-size:12px;color:#93c5fd;white-space:nowrap}.tag-filter-section{background:var(--bg-tertiary);border-radius:12px;padding:20px;margin-bottom:24px;border:1px solid var(--border-color)}.filter-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.filter-title{font-size:16px;font-weight:600;color:var(--text-primary);margin:0}.clear-filters-btn{background:transparent;border:none;color:var(--text-secondary);font-size:14px;cursor:pointer;padding:4px 8px;border-radius:4px;transition:var(--transition-fast)}.clear-filters-btn:hover{color:var(--danger-color);background:#ef44441a}.tag-filter-list{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}.tag-filter-btn{background:var(--bg-primary);border:1px solid var(--border-color);border-radius:20px;padding:6px 14px;font-size:14px;color:var(--text-secondary);cursor:pointer;transition:var(--transition-fast)}.tag-filter-btn:hover{border-color:var(--primary-color);color:var(--text-primary)}.tag-filter-btn.active{background:#3b82f626;border-color:var(--primary-color);color:var(--primary-color);font-weight:500}.filter-status{font-size:13px;color:var(--text-tertiary);font-style:italic;padding-top:8px;border-top:1px solid rgba(255,255,255,.05)}.lesson-slideshow{position:absolute;inset:0;background:var(--bg-secondary);display:flex;flex-direction:column;z-index:20}.slideshow-header{padding:20px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border-color);background:var(--bg-tertiary)}.slideshow-title{font-size:18px;font-weight:600;color:var(--text-primary);margin:0}.slideshow-controls-top{display:flex;gap:12px}.slideshow-content{flex:1;display:flex;justify-content:center;align-items:center;padding:40px;overflow-y:auto;position:relative}.slide-card{background:var(--bg-primary);width:100%;max-width:900px;min-height:500px;aspect-ratio:16 / 9;border-radius:24px;padding:60px;box-shadow:var(--shadow-lg);display:flex;flex-direction:column;justify-content:center;align-items:center;border:1px solid var(--border-color);transition:transform .3s ease;position:relative;overflow:hidden}.slide-content-wrapper{width:100%;height:100%;overflow-y:auto;display:flex;flex-direction:column;justify-content:center;text-align:left}.slide-content-wrapper h1,.slide-content-wrapper h2{font-size:42px;margin-bottom:32px;color:var(--primary-color);text-align:center;line-height:1.2}.slide-content-wrapper h3{font-size:32px;margin-bottom:24px;color:var(--text-primary)}.slide-content-wrapper p{font-size:24px;line-height:1.6;color:var(--text-secondary);margin-bottom:24px}.slide-content-wrapper ul,.slide-content-wrapper ol{font-size:24px;line-height:1.6;color:var(--text-secondary);margin-bottom:24px;padding-left:40px}.slide-content-wrapper li{margin-bottom:16px}.slide-content-wrapper strong{color:var(--text-primary);font-weight:700}.slide-content-wrapper blockquote{border-left:6px solid var(--primary-color);padding-left:24px;font-style:italic;color:var(--text-primary);font-size:26px;margin:32px 0}.slideshow-footer{padding:20px 40px;display:flex;justify-content:space-between;align-items:center;background:var(--bg-tertiary);border-top:1px solid var(--border-color)}.slide-counter{font-variant-numeric:tabular-nums;color:var(--text-secondary);font-weight:600}.nav-buttons{display:flex;gap:16px}.nav-btn{background:var(--bg-secondary);border:1px solid var(--border-color);color:var(--text-primary);width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s;font-size:20px}.nav-btn:hover:not(:disabled){background:var(--primary-color);border-color:var(--primary-color);color:#fff;transform:translateY(-2px)}.nav-btn:disabled{opacity:.3;cursor:not-allowed}.keyboard-hint{position:absolute;bottom:100px;left:50%;transform:translate(-50%);background:#00000080;color:#ffffffb3;padding:8px 16px;border-radius:20px;font-size:14px;pointer-events:none;opacity:0;transition:opacity .3s}.lesson-slideshow:hover .keyboard-hint{opacity:1}@media(max-width:768px){.slide-card{padding:30px;aspect-ratio:auto;height:auto;min-height:60vh}.slide-content-wrapper h1,.slide-content-wrapper h2{font-size:28px}.slide-content-wrapper p,.slide-content-wrapper li{font-size:18px}}.book-mode-overlay{position:fixed;inset:0;background:#0f172af2;z-index:2000;display:flex;align-items:center;justify-content:center;padding:20px;animation:fadeIn .3s ease-out}.book-container{background:#fff;width:100%;max-width:1200px;height:90vh;border-radius:10px;box-shadow:0 30px 60px #0009;display:flex;flex-direction:column;position:relative;overflow:hidden;border:12px solid #8b4513;perspective:2500px}.book-close-btn{position:absolute;top:10px;right:10px;background:#ef4444;color:#fff;border:none;width:32px;height:32px;border-radius:50%;font-size:16px;cursor:pointer;z-index:50;display:flex;align-items:center;justify-content:center;font-weight:700;box-shadow:0 2px 5px #0003}.book-close-btn:hover{background:#dc2626;transform:scale(1.1)}.book-progress-bar{height:8px;background:#f1f5f9;width:100%;flex-shrink:0}.book-progress-fill{height:100%;background:#3b82f6;transition:width .3s ease}.book-stage{flex:1;position:relative;display:flex;background:#fdfbf7;min-height:0;overflow:hidden}.book-spread{display:flex;width:100%;height:100%}.book-page-left,.book-page-right{flex:1;height:100%;overflow:hidden;position:relative;background:#fff;border-right:1px solid #e2e8f0;display:flex;flex-direction:column}.book-image-container{flex:1;width:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px;background:#fdfbf7;overflow:hidden}.book-image{max-width:100%;max-height:calc(100% - 20px);object-fit:contain;border-radius:8px;box-shadow:2px 4px 12px #00000026;background:#fff;padding:8px}.ai-disclaimer{font-size:11px;color:#000;margin-top:6px;font-family:sans-serif;text-align:center;background:#fffc;padding:3px 10px;border-radius:10px;font-weight:500}.book-content-container{flex:1;width:100%;padding:40px 60px;overflow-y:auto;background:#fff;color:#000;display:flex;flex-direction:column}.page-number{margin-top:auto;padding-top:20px;text-align:center;font-family:Times New Roman,serif;color:#000;font-size:14px;font-weight:700}.book-page-title{font-family:Verdana,Segoe UI,sans-serif;color:#000;font-size:30px;margin-bottom:24px;text-align:center;line-height:1.3;font-weight:700}.book-text{font-family:Verdana,Segoe UI,sans-serif;font-size:19px;line-height:1.7;color:#000;font-weight:500;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.book-text p{margin-bottom:16px;color:#000}.book-text h3{color:#000}.flipper{position:absolute;top:0;width:50%;height:100%;transform-style:preserve-3d;z-index:10}.flipper-front,.flipper-back{position:absolute;width:100%;height:100%;backface-visibility:hidden;background:#fff;top:0;left:0;overflow:hidden;border-right:1px solid #ddd;display:flex;flex-direction:column}.flip-next{right:0;transform-origin:left center;animation:pageTurnNext .8s ease-in-out forwards}.flip-next .flipper-front{z-index:2}.flip-next .flipper-back{z-index:1;transform:rotateY(180deg)}@keyframes pageTurnNext{0%{transform:rotateY(0)}to{transform:rotateY(-180deg)}}.flip-prev{left:0;transform-origin:right center;animation:pageTurnPrev .8s ease-in-out forwards}.flip-prev .flipper-front{z-index:2}.flip-prev .flipper-back{z-index:1;transform:rotateY(-180deg)}@keyframes pageTurnPrev{0%{transform:rotateY(0)}to{transform:rotateY(180deg)}}.flip-next .flipper-front:after{content:"";position:absolute;inset:0;background:linear-gradient(to right,#0000001a,#0000);opacity:0;animation:shadowIn .8s ease-in-out forwards;pointer-events:none}@keyframes shadowIn{0%{opacity:0}50%{opacity:.3}to{opacity:0}}.image-error-fallback{background:linear-gradient(135deg,#fcd34d,#fbbf24);display:flex;align-items:center;justify-content:center;flex-direction:column}.fallback-content{text-align:center;color:#78350f;padding:20px}.fallback-icon{font-size:60px;margin-bottom:16px;animation:bounce 2s infinite;font-family:"Apple Color Emoji","Segoe UI Emoji","Noto Color Emoji",sans-serif}.fallback-title{font-size:20px;font-family:Comic Sans MS,Chalkboard SE,sans-serif;font-weight:700}.image-loading-spinner{display:flex;flex-direction:column;align-items:center;justify-content:center;color:#64748b;height:100%;width:100%}.spinner-icon{font-size:48px;margin-bottom:16px;animation:bounce 1s infinite}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-20px)}}.book-controls{height:70px;background:#fdfbf7;display:flex;align-items:center;justify-content:space-between;padding:0 20px;border-top:1px solid #e2e8f0;z-index:30;flex-shrink:0}.book-nav-btn{padding:10px 20px;border-radius:50px;border:none;font-size:16px;font-weight:700;font-family:Comic Sans MS,Chalkboard SE,sans-serif;cursor:pointer;transition:all .2s}.book-nav-btn.prev{background:#e2e8f0;color:#000}.book-nav-btn.prev:hover:not(:disabled){background:#cbd5e1}.book-nav-btn.prev:disabled{opacity:.5;cursor:not-allowed}.book-nav-btn.next{background:#3b82f6;color:#fff;box-shadow:0 4px 10px #3b82f64d}.book-nav-btn.next:hover{background:#2563eb;transform:translateY(-2px);box-shadow:0 6px 15px #3b82f666}.book-page-indicator{font-size:14px;color:#000;font-weight:600;background:#e2e8f0;padding:4px 12px;border-radius:20px}@media(max-width:768px){.book-mode-overlay{padding:0;background:#000}.book-container{height:100%;max-height:100%;border:none;border-radius:0}.book-spread{flex-direction:column}.book-page-left{height:40%;border-right:none;border-bottom:1px solid #e2e8f0}.book-page-right{height:60%}.book-image-container{padding:10px}.book-content-container{padding:20px}.book-page-title{font-size:24px;margin-bottom:12px}.book-text{font-size:16px}.flipper{display:none}.book-controls{padding:0 10px;height:60px}.book-nav-btn{padding:8px 16px;font-size:14px}}.skill-picker-overlay{position:fixed;inset:0;background:#000000d9;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px;animation:fadeIn .3s ease-out}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.skill-picker-modal{background:linear-gradient(135deg,#1e1e2e,#2a2a3e);border-radius:20px;max-width:900px;width:100%;max-height:90vh;overflow-y:auto;box-shadow:0 20px 60px #00000080;animation:slideUp .4s ease-out}@keyframes slideUp{0%{transform:translateY(30px);opacity:0}to{transform:translateY(0);opacity:1}}.welcome-screen{padding:60px 40px;text-align:center}.welcome-content{max-width:600px;margin:0 auto}.welcome-title{font-size:2.5rem;font-weight:800;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:10px}.welcome-subtitle{font-size:1.25rem;color:#a0a0b0;margin-bottom:50px}.welcome-features{display:flex;flex-direction:column;gap:30px;margin-bottom:50px;text-align:left}.feature-item{display:flex;align-items:flex-start;gap:20px}.feature-icon{font-size:2.5rem;flex-shrink:0}.feature-item h3{font-size:1.25rem;font-weight:600;color:#fff;margin-bottom:5px}.feature-item p{font-size:1rem;color:#a0a0b0;line-height:1.5}.welcome-actions{display:flex;flex-direction:column;gap:15px;align-items:center}.categories-screen{padding:40px}.modal-header{text-align:center;margin-bottom:30px}.modal-header h2{font-size:2rem;font-weight:700;color:#fff;margin-bottom:10px}.modal-subtitle{font-size:1rem;color:#a0a0b0}.categories-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;margin-bottom:30px}.category-card{position:relative;background:linear-gradient(135deg,#2a2a3e,#1e1e2e);border:2px solid #3a3a4e;border-radius:15px;padding:25px;cursor:pointer;transition:all .3s ease;text-align:left;display:flex;flex-direction:column;gap:15px}.category-card:hover{border-color:#667eea;transform:translateY(-2px);box-shadow:0 8px 20px #667eea33}.category-card.selected{border-color:#667eea;background:linear-gradient(135deg,#2a2a4e,#1e1e3e);box-shadow:0 8px 20px #667eea4d}.category-icon{font-size:2.5rem;line-height:1}.category-content{flex:1}.category-name{font-size:1.25rem;font-weight:600;color:#fff;margin-bottom:8px}.category-description{font-size:.9rem;color:#a0a0b0;line-height:1.4;margin-bottom:10px}.category-skill-count{font-size:.85rem;color:#667eea;font-weight:500}.category-checkmark{position:absolute;top:15px;right:15px;width:30px;height:30px;background:#667eea;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1.2rem}.review-screen{padding:40px}.review-content{margin-bottom:30px}.review-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:20px;margin-bottom:40px}.stat-card{background:linear-gradient(135deg,#667eea,#764ba2);border-radius:15px;padding:25px;text-align:center}.stat-number{font-size:2.5rem;font-weight:800;color:#fff;margin-bottom:5px}.stat-label{font-size:.9rem;color:#ffffffe6;font-weight:500}.selected-categories-list{display:flex;flex-direction:column;gap:20px}.selected-category-item{background:linear-gradient(135deg,#2a2a3e,#1e1e2e);border:2px solid #3a3a4e;border-radius:12px;padding:20px}.category-header-review{display:flex;align-items:center;gap:12px;margin-bottom:15px}.category-icon-small{font-size:1.5rem}.category-name-small{font-size:1.1rem;font-weight:600;color:#fff;flex:1}.category-count{font-size:.85rem;color:#667eea;font-weight:500}.category-skills-preview{display:flex;flex-wrap:wrap;gap:8px}.skill-tag{background:#667eea33;border:1px solid rgba(102,126,234,.3);border-radius:20px;padding:6px 14px;font-size:.85rem;color:#a0b0ff}.skill-tag.more{background:#764ba233;border-color:#764ba24d;color:#d0a0ff}.modal-footer{border-top:1px solid #3a3a4e;padding-top:25px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:15px}.selection-summary{font-size:.95rem;color:#a0a0b0}.selection-summary strong{color:#667eea;font-weight:600}.footer-note{font-size:.9rem;color:#a0a0b0;flex:1}.modal-actions{display:flex;gap:12px}.btn-primary-large{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;border-radius:12px;padding:16px 40px;font-size:1.1rem;font-weight:600;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 15px #667eea66}.btn-primary-large:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 20px #667eea99}.btn-secondary-large{background:transparent;color:#667eea;border:2px solid #667eea;border-radius:12px;padding:16px 40px;font-size:1.1rem;font-weight:600;cursor:pointer;transition:all .3s ease}.btn-secondary-large:hover:not(:disabled){background:#667eea1a;transform:translateY(-2px);box-shadow:0 4px 15px #667eea4d}.btn-primary{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;border-radius:10px;padding:12px 30px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease}.btn-primary:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 4px 12px #667eea66}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-secondary{background:transparent;color:#a0a0b0;border:2px solid #3a3a4e;border-radius:10px;padding:12px 30px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease}.btn-secondary:hover{border-color:#667eea;color:#fff}.btn-text{background:transparent;color:#a0a0b0;border:none;padding:10px 20px;font-size:.95rem;cursor:pointer;transition:color .3s ease}.btn-text:hover{color:#fff;text-decoration:underline}.skill-picker-modal::-webkit-scrollbar{width:8px}.skill-picker-modal::-webkit-scrollbar-track{background:#1e1e2e;border-radius:10px}.skill-picker-modal::-webkit-scrollbar-thumb{background:#3a3a4e;border-radius:10px}.skill-picker-modal::-webkit-scrollbar-thumb:hover{background:#4a4a5e}@media(max-width:768px){.skill-picker-modal{max-width:100%;max-height:100vh;border-radius:0}.welcome-screen{padding:40px 24px}.categories-screen,.review-screen{padding:24px}.welcome-title{font-size:2rem}.categories-grid,.review-stats{grid-template-columns:1fr}.modal-footer{flex-direction:column;align-items:stretch}.modal-actions{flex-direction:column}.btn-primary,.btn-secondary{width:100%}}.path-selection{margin:40px 0;text-align:center}.path-selection h3{font-size:1.5rem;font-weight:700;color:#fff;margin-bottom:25px}.path-options{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px}.path-option-card{background:linear-gradient(135deg,#2a2a3e,#1e1e2e);border:2px solid #3a3a4e;border-radius:15px;padding:30px;cursor:pointer;transition:all .3s ease;text-align:center}.path-option-card:hover{border-color:#667eea;transform:translateY(-2px);box-shadow:0 8px 20px #667eea33}.path-option-icon{font-size:3rem;margin-bottom:15px}.path-option-card h4{font-size:1.25rem;font-weight:600;color:#fff;margin-bottom:10px}.path-option-card p{font-size:.95rem;color:#a0a0b0;line-height:1.5}.courses-screen{padding:40px}.courses-container{display:flex;flex-direction:column;gap:40px;margin-bottom:30px}.course-category-section{display:flex;flex-direction:column;gap:20px}.course-category-header{display:flex;align-items:center;gap:15px;padding-bottom:15px;border-bottom:2px solid #3a3a4e}.course-category-icon{font-size:2rem}.course-category-name{font-size:1.5rem;font-weight:700;color:#fff;margin-bottom:5px}.course-category-description{font-size:.95rem;color:#a0a0b0}.courses-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px}.course-card{position:relative;background:linear-gradient(135deg,#2a2a3e,#1e1e2e);border:2px solid #3a3a4e;border-radius:15px;padding:25px;cursor:pointer;transition:all .3s ease;text-align:left;display:flex;gap:15px}.course-card:hover{border-color:#667eea;transform:translateY(-2px);box-shadow:0 8px 20px #667eea33}.course-card.selected{border-color:#667eea;background:linear-gradient(135deg,#2a2a4e,#1e1e3e);box-shadow:0 8px 20px #667eea4d}.course-icon{font-size:2.5rem;line-height:1;flex-shrink:0}.course-content{flex:1;display:flex;flex-direction:column;gap:10px}.course-name{font-size:1.25rem;font-weight:600;color:#fff;margin:0}.course-description{font-size:.9rem;color:#a0a0b0;line-height:1.4;margin:0}.course-meta{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:5px}.course-difficulty{padding:4px 10px;border-radius:12px;font-size:.75rem;font-weight:600;text-transform:capitalize}.course-difficulty[data-difficulty=beginner]{background:#4caf5033;color:#81c784;border:1px solid rgba(76,175,80,.3)}.course-difficulty[data-difficulty=intermediate]{background:#2196f333;color:#64b5f6;border:1px solid rgba(33,150,243,.3)}.course-difficulty[data-difficulty=advanced]{background:#ff980033;color:#ffb74d;border:1px solid rgba(255,152,0,.3)}.course-difficulty[data-difficulty=expert]{background:#f4433633;color:#e57373;border:1px solid rgba(244,67,54,.3)}.course-duration,.course-skill-count{font-size:.8rem;color:#a0a0b0}.course-skill-count{color:#667eea;font-weight:500}.course-checkmark{position:absolute;top:15px;right:15px;width:30px;height:30px;background:#667eea;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1.2rem}.selected-courses-list{display:flex;flex-direction:column;gap:20px}.selected-course-item{background:linear-gradient(135deg,#2a2a3e,#1e1e2e);border:2px solid #3a3a4e;border-radius:12px;padding:20px}.course-header-review{display:flex;align-items:flex-start;gap:15px;margin-bottom:15px}.course-icon-small{font-size:2rem;flex-shrink:0}.course-info-review{flex:1;display:flex;flex-direction:column;gap:8px}.course-name-small{font-size:1.2rem;font-weight:600;color:#fff}.course-meta-small{display:flex;flex-wrap:wrap;gap:10px;align-items:center}.meta-badge{padding:3px 8px;border-radius:10px;font-size:.7rem;font-weight:600;text-transform:capitalize}.meta-badge[data-difficulty=beginner]{background:#4caf5033;color:#81c784;border:1px solid rgba(76,175,80,.3)}.meta-badge[data-difficulty=intermediate]{background:#2196f333;color:#64b5f6;border:1px solid rgba(33,150,243,.3)}.meta-badge[data-difficulty=advanced]{background:#ff980033;color:#ffb74d;border:1px solid rgba(255,152,0,.3)}.meta-badge[data-difficulty=expert]{background:#f4433633;color:#e57373;border:1px solid rgba(244,67,54,.3)}.meta-info{font-size:.85rem;color:#a0a0b0}.course-skills-preview{display:flex;flex-wrap:wrap;gap:8px}@media(max-width:768px){.courses-screen{padding:24px}.path-options,.courses-grid{grid-template-columns:1fr}.course-category-header{flex-direction:column;align-items:flex-start;gap:10px}.course-card{flex-direction:column}.course-icon{font-size:2rem}.course-meta{flex-direction:column;align-items:flex-start;gap:8px}}@media(max-width:480px){.path-option-card{padding:20px}.course-name{font-size:1.1rem}.course-description{font-size:.85rem}}.skill-tree-container{width:100%;min-height:100vh;padding:20px 20px 80px;overflow:auto}.skill-tree-header{text-align:center;margin:40px auto 60px;max-width:800px}.skill-tree-header h1{color:var(--text-primary);font-size:48px;font-weight:800;margin:0 0 16px;background:linear-gradient(135deg,var(--primary-color) 0%,var(--accent-color) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:-.02em}.subtitle{color:var(--text-secondary);font-size:20px;margin:0 0 32px;font-weight:300}.header-actions{display:flex;flex-direction:column;align-items:center;gap:20px}.preferences-info{display:flex;align-items:center;gap:12px;flex-wrap:wrap;justify-content:center;background:#3b82f61a;border:1px solid rgba(59,130,246,.2);border-radius:50px;padding:8px 20px;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.preferences-badge{color:var(--primary-hover);font-size:14px;font-weight:600}.btn-link{background:none;border:none;color:var(--text-tertiary);font-size:13px;cursor:pointer;text-decoration:none;transition:var(--transition-fast);padding:4px 8px}.btn-link:hover{color:var(--text-primary);text-decoration:underline}.btn-customize{padding:14px 32px;background:linear-gradient(135deg,var(--primary-color) 0%,var(--accent-color) 100%);border:none;border-radius:50px;color:#fff;font-size:16px;font-weight:600;cursor:pointer;transition:var(--transition-normal);box-shadow:0 4px 15px #3b82f64d}.btn-customize:hover{transform:translateY(-2px);box-shadow:0 8px 25px #3b82f680}.btn-reset{padding:10px 20px;background:transparent;border:1px solid var(--border-color);border-radius:50px;color:var(--text-tertiary);font-size:13px;cursor:pointer;transition:var(--transition-normal)}.btn-reset:hover{border-color:var(--danger-color);color:var(--danger-color);background:#ef44441a}.skill-tree-content{max-width:1400px;margin:0 auto}.category-section{margin-bottom:60px;animation:fadeIn .5s ease-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.category-title{color:var(--text-primary);font-size:24px;margin-bottom:24px;display:flex;align-items:center;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--border-color)}.category-icon{font-size:28px}.skill-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}.no-skills-message{text-align:center;padding:60px;color:var(--text-secondary);font-size:18px;background:var(--bg-secondary);border-radius:16px;border:1px dashed var(--border-color)}.legend{display:flex;justify-content:center;gap:30px;margin-top:60px;padding:20px;background:#0f172acc;border-radius:50px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid var(--border-color);max-width:fit-content;margin-left:auto;margin-right:auto;position:sticky;bottom:20px;z-index:10;box-shadow:var(--shadow-lg)}.legend-item{display:flex;align-items:center;gap:10px;color:var(--text-secondary);font-size:14px;font-weight:500}.legend-icon{font-size:18px;display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:50%;background:var(--bg-tertiary)}.legend-icon.locked{opacity:.5}.legend-icon.available{color:var(--primary-color);background:#3b82f61a}.legend-icon.in-progress{color:var(--warning-color);background:#f59e0b1a}.legend-icon.completed{color:var(--success-color);background:#10b9811a}@media(max-width:768px){.skill-grid{grid-template-columns:1fr}.skill-tree-header h1{font-size:36px}.legend{flex-wrap:wrap;border-radius:16px;bottom:10px;width:90%;gap:15px}.skill-node{min-height:auto;padding:20px}.skill-icon{margin-bottom:10px}.btn-customize,.btn-reset,.btn-link{min-height:44px;display:flex;align-items:center;justify-content:center}}.search-container{width:100%;max-width:500px;margin:0 auto 24px;position:relative}.search-input{width:100%;padding:14px 24px;border-radius:50px;border:1px solid var(--border-color);background:#1e293b80;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);color:var(--text-primary);font-size:16px;transition:var(--transition-fast);box-shadow:var(--shadow-sm)}.search-input:focus{outline:none;border-color:var(--primary-color);background:#1e293bcc;box-shadow:0 0 0 2px #3b82f633}.search-input::placeholder{color:var(--text-tertiary)}.app{width:100%;min-height:100vh;margin:0;padding:0}